Photo illustration shows Afghan army soldiers and US soldiers patrolling Sabari district in Khost province. An Afghan army soldier killed two NATO troops in a new "green-on-blue" insider attack on ... more 

Photo illustration shows Afghan army soldiers and US soldiers patrolling Sabari district in Khost province. An Afghan army soldier killed two NATO troops in a new "green-on-blue" insider attack on Monday, the US-led International Security Assistance Force said less